diff --git a/index.js b/index.js
index 61dbb95..4ebd775 100644
--- a/index.js
+++ b/index.js
@@ -109,18 +109,17 @@ module.exports = {
     let max = str.length
     let tmp = ''
     for (let i = 0; i < len; i++) {
-      let r = Math.floor(Math.random() * max)
+      let r = (Math.random() * max) >> 0
       tmp += str[r]
     }
     return tmp
   },
 
   // 返回一个如下格式的 xxxxxxxx-xxxx-xxxx-xxxxxxxx 的唯一ID
-  uuid(line = true) {
+  uuid(pipe = '-') {
     let rand = CRYPTO.randomBytes(8).toString('hex')
     let now = (Date.now() / 1000).toString(16).slice(0, 8)
 
-    let pipe = line ? '-' : ''
     if (this.__stamp__ === now) {
       this.__inc__++
     } else {
diff --git a/package.json b/package.json
index ef59383..50bcb33 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "crypto.js",
-  "version": "1.3.0",
+  "version": "1.3.1",
   "description": "原生crypto加密模块的二次封装,简化常用加密函数的使用",
   "keywords": ["md5", "sha1", "base64", "fivejs", "crypto"],
   "author": "yutent <yutent@doui.cc>",